This colorful wooden puzzle is fun to put together as different designs. And it can remain just that -- a beautiful wooden design tool for young children. But embedded in this puzzle are important mathematical ideas. This handout is free, but after reading it you may want to buy the Binomial Squares Puzzle from RedHen LLC toys. A YouTube video is available at https://youtu.be/YQ6rExEYdXE that will give you an idea of the many things you can do besides enjoying this beautiful puzzle with a child.